Reach Cooling 41-2731 Radiator

Radiator for 2004-2007 Cadillac CTS

Restore cooling performance with this Reach Cooling radiator, part number 41-2731. It is built with an aluminum core and plastic tanks in an OE-style layout for the 2004-2007 Cadillac CTS, including applications that require a radiator cap and those with under-vehicle installation access.

Reach Cooling’s radiator line focuses on OE-quality replacement cooling components for automotive applications, with coverage across a wide range of domestic and international part numbers. The 41-2731 follows that approach with application-specific dimensions and transmission cooler provisions for the Cadillac CTS platform.

Key Features

• Aluminum core with plastic tanks
• Core size: 16 3/4 in. height, 25 11/16 in. width, 1 in. thickness
• Single-row core construction
• Top right inlet and bottom left outlet layout
• 1 5/16 in. inlet and outlet diameters
• Plated transmission oil cooler with 14 3/4 in. fitting spacing
• OE-style dimensions for direct replacement use

Detailed Description

Reach Cooling 41-2731 is a replacement radiator for the 2004-2007 Cadillac CTS. It uses an aluminum core for efficient heat transfer, paired with plastic tanks and a single-row design. The radiator measures 16 3/4 inches tall, 25 11/16 inches wide, and 1 inch thick, with a top right inlet and bottom left outlet to match the listed vehicle configuration. The plated transmission oil cooler and 1 5/16 inch inlet and outlet diameters support the factory-style cooling layout found on these CTS applications.

This part number is also referenced in aftermarket catalogs under cross-reference numbers such as Spectra Premium CU2731 and DENSO Auto Parts 221-9394 for the same application. If you are searching for a radiator for 2004-2007 Cadillac CTS or a replacement radiator for a 2006 Cadillac CTS built after 3/27/06, this part number is listed for those vehicle-specific fitments.

What This Radiator Helps Address

• Overheating caused by a leaking or restricted radiator
• Coolant loss from cracked tanks or damaged core tubes
• Transmission cooling concerns tied to an aging radiator cooler circuit
• Reduced heat rejection from corrosion or internal blockage
• Fitment issues when replacing the original Cadillac CTS radiator

Installation Notes and Tips

• Compatible With 2004-2007 Cadillac CTS, radiator applications listed in the fitment data.
• Compatible With 2006 Cadillac CTS, from 3/27/06 radiator applications listed in the fitment data.
• Compatible With 2006 Cadillac CTS, from 3/07 radiator applications listed in the fitment data.
• Hoist may be required for radiator installation underneath the vehicle.
• Radiator cap is required on the noted 2004-2007 Cadillac CTS application.
• Verify inlet and outlet locations, header dimensions, and transmission cooler line spacing before installation.

Quality Assurance

Reach Cooling manufactures aftermarket cooling products for automotive, heavy truck, and industrial use, with OE-quality radiator coverage for U.S. and international markets. Part number 41-2731 is built to match the listed Cadillac CTS applications and dimensional requirements.